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Did you know that there are 70 sextillion (that's 70,000,000,000,000,000,000,000) stars in the universe? Discover other mind-expanding facts about the stars, planets, moons and space travel in these exciting guides.What else is out there? Series features: These fun, accessible guides are the perfect introduction to space for inquisitive minds.The author's friendly style make hard-to-grasp concepts comprehendable. Practical projects throughout each book encourage young readers to 'learn through doing'. Packed with jaw-dropping facts, mega number-crunching, planetary statistics, maps and charts. Includes info on important astronomers, scientists and astronauts who've mapped the heavens through time. Illustrated with stunning state-of-the-art satellite pictures.